Karplus, V.J. and Paltsev, S. (2012). Proposed Vehicle Fuel Economy Standards in the United States for 2017 to 2025: Impacts on the Economy, Energy, and Greenhouse Gas Emissions. Transportation Research Record, 2287, 132-139. (Winner of the Pike Johnson Best Paper Award.)

Karplus, V.J., Paltsev, S., & Reilly, J. M. (2010). Prospects for plug-in hybrid electric vehicles in the United States and Japan: A general equilibrium analysis. Transportation Research Part A. 44(8), 620-641.